Speaking to TMZ, Hunnam said of Dornan: "I'm sure he'll do a great job. I don't really know his work, but I know Sam [Taylor-Wood], the director, is amazing, and she has fantastic taste, so I'm sure he'll do a great job."

Sam Taylor-Wood is directing the adaptation of EL James's erotic best-seller, while Patrick Marber (Closer) and Mark Bomback (The Wolverine) have been enlisted to polish Kelly Marcel's script.

"I just really understand it," she insisted. "I think it's an incredible love story and that's why it's affected so many people."

She further explained: "[EL James] did a really good job of explaining how that just can happen sometimes and you have this chemical pull to someone.

"Adding in the sex makes it perfect. Sometimes you feel a little bit naughty and that's okay."

Gallery - Jamie Dornan in pictures:

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Jamie Dornan as Paul Spector in the crime/drama series The Fall. He described playing the serial killer as "tough, really tough, and not an easy place to have your head in for four months".
Copyright: BBC Artists Studio/Steffan Hill
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